Physics

Problem

For a single point charge moving with velocity vector

\vec v

, which of the following best describes the orientation of the magnetic field

\vec B

at a point whose position vector from the charge is

\vec r

? a) Parallel to

\vec r

b) Perpendicular to both

\vec v

and

\vec r

c) Parallel to

\vec v

d) Perpendicular to

\vec v

but lying in the plane formed by

\vec v

and

\vec r